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Add API to get idle time 

Add the API to get  time sleeping. This is in preparation for CPU
usage support.
pull/6857/head
Russ Butler 2017-12-19 21:20:32 -06:00 committed by Deepika
parent 8be2e34390
commit e88f4314cd
1 changed files with 14 additions and 0 deletions
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14
rtos/TARGET_CORTEX/mbed_rtx_idle.cpp
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@ -34,6 +34,14 @@ extern "C" {
using namespace mbed;
static const ticker_data_t *const cpu_usage_ticker = get_lp_ticker_data();
static uint32_t idle_time = 0;
extern uint32_t mbed_time_idle(void)
{
return idle_time;
}
#ifdef MBED_TICKLESS
#include "rtos/TARGET_CORTEX/SysTimer.h"
@ -98,6 +106,7 @@ static void default_idle_hook(void)
uint32_t ticks_to_sleep = osKernelSuspend();
os_timer->suspend(ticks_to_sleep);
uint32_t start = ticker_read_us(cpu_usage_ticker);
bool event_pending = false;
while (!os_timer->suspend_time_passed() && !event_pending) {
@ -113,6 +122,8 @@ static void default_idle_hook(void)
__ISB();
}
osKernelResume(os_timer->resume());
uint32_t end = ticker_read_us(cpu_usage_ticker);
idle_time += end - start;
}
#elif defined(FEATURE_UVISOR)
@ -129,9 +140,12 @@ static void default_idle_hook(void)
{
// critical section to complete sleep with locked deepsleep
core_util_critical_section_enter();
uint32_t start = ticker_read_us(cpu_usage_ticker);
sleep_manager_lock_deep_sleep();
sleep();
sleep_manager_unlock_deep_sleep();
uint32_t end = ticker_read_us(cpu_usage_ticker);
idle_time += end - start;
core_util_critical_section_exit();
}